Log-dressing machine



(No Model.)

W. D. HATCH.

LOG DRESSING MACHINE.

No. 257,492. Patented May 9,1882 Fig.1. 7

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NITED STATES PATENT OFFICE.

WILLIS I). HATCH, OF BATH, MAINE.

LOG-DRESSING MACHINE.

SPECIFICATION forming part of Letters Patent No. 257,492, dated May 9, 1882,

Application filed January 23, 1882. (No model.)

To all whom it may concern Be it known that I, WILLIS 1). HAron, of

- Bath, of the county of Sagadahoc, of the State of Maine, have invented a new and useful Improvement in Clapboard Log Dressers; and I do hereby declare the same to be described in the following specification and represented in the accompanying drawings, of which- Figure 1 is a top View, Fig. 2 an end elevation, and Fig. 3 a transverse section, of a machine embracing my invention, the nature of which is defined in the claims hereinafter presented.

The said machine is for removing the bark and sap portions of a log and reducing such log to a cylindrical form for being sawed or converted into clapboards by mechanism usually employed for such purpose.

In the drawings, A denotes the frame for supporting the main operative parts, there being within the front part of such frame an arbor, B, provided with a set, 0, of driving-pulleys. In alignment with the said arbor is an adjustable center, D, movable lengthwise in the frame, the latter being provided with a clamp-screw, a, for holding it (the center) from moving endwise when in a log, E, held by it and the arbor.

VlTithin the frameA, and supported by and between longitudinal and parallel guides b b, is the tool-raok-sustaining carriage F, having the tool-rack G arranged within it and adapted to slide in it either toward or away from the log. The said tool-rack is a bar provided with rackteeth on one side of it, and having at its front end the U-shaped cutter c.

A hanger or hook, 6?, extends up from the tool-rack and hooks upon a long shaft, 0, provided at its ends with gear-wheels ff, to engage with and restupon two racks,g 9. Guides h h, erected on the said racks, and with them arranged on the frame A in manner as represented, serve not only to prevent the shaft 0 and its wheels f f from moving endwise, but. to properly guide them in their advance or retreat with the tool-rack. In its rear part the tool-rack is slotted, as shown at h, to receive alongsupporting-roller, i, disposed in the frame A in manner as represented.

In the tool-rack carriage isapinionfli', which is fastened on an upright arbor, I, upon which, at its top, a ratchet-wheel, m, is fixed. The pinion engages with the teeth of the rack-bar. I urtherinore, there is fulcruined on the arbor Z a lever, or, provided with apawl, 0, to engage k with the ratchet-wheel m, the said pawl being drawn up to the wheel by a spring, 1), suitably applied to it and the lever.

A spiral spring, 1, attached to the front arm of the lover a and to a post, 1', serves to move the lever in order to retract the pawl in the ratchet-wheel and to draw the lever up to a stop, .9, extended from the post. (See Fig. 4, which is afront view of the said post, the spiral spring, and the lever.)

The carriage has pivoted to it a spanner, s, shaped as shown in Fig. 5. The spanner enters the duplex spiral groove t, formed in a cylindrical shaft, H, arranged in the frame, and provided with a set, I, of pulleys, as shown, about one of which and one of the set 0 an endless belt, K, is arranged. On revolving the arbor B rotary motion will be communiouted to the spirally-grooved shaft H, whose two spiral grooves communicate or open into each other at their ends and cross each other between such, they being pitched in opposite directions to each other, as shown.

Fixed to the frame A, and arranged therein as represented, are two stops or abutments,'L M, for the lever n to be carried against in order to move it, so as to cause the pawl to operate or turn the ratchet-wheel. To the ratchetwheel there is applied a clamp, N, capable of being moved along the periphery of the wheel, and fixed in position by a screw, a, suitably adapted to the clamp and to screw against the wheel. This clamp is to stop the ratchet-wheel from being revolved by its pawl, such stoppage taking place when the clamp, by the wheel, may be carried against the lever 41, for on such taking place the lever will be prevented from drawing the pawl backward on the teeth of the wheel. This screw clamp is therefore to stop the feeding forward of the tool-rack G when the log may have been reduced to the desirable diameter. Usually I have on the ratchetwheel a scale to determine the position of the clamp N, for having the log reduced to any required diameter.

While the machine may be in operation there will be imparted to the tool-rack reciprocating lateral motions, so as to carry the tool alternately from one to the other end of the log, the tool being fed forward or advanced a little preparatory to each of such movements. In order that the tool may be so advanced, the traverse of the tool should be such as to carry it beyond the end of the log sufficiently to allow of the advance of the tool.

The feeding of the tool will be caused by the lever a, during each traverse of the tool rack carriage, being moved against one or the other of the abutinents L M, whereby such lever will be moved so as to force the pawl against the ratchet-wheel in a manner to partially revolve the said ratchet-wheel, and thereby cause the pinion of its arbor to advance the tool-rack. The pawl will be retracted in the wheel by the action of the spiral spring q, as hereinbefore mentioned.

I claim as my invention in the above-described machine as follows, viz:

1. The combination for feeding the cutter to the log, it consisting of the sliding tool-rack, its supporting-carriage, mechanism for reciprocatin g such carriage, and mechanism for intermittently advancing the tool-rack, all being substantially and to operate as set forth, the mechanism for reciprocating the carriage being the duplex spirally -,grooved shaft H, the

spanner s, and the mechanism for intermittently advancing the tool-rack being the pinion k, arbor l, ratchet-wheel m, pawl 0, spiral spring q, post 1", stop 8, and the abutments L M, all beingconstrueted and arranged as shown and described.

2. The combination of the sliding tool-rack, provided with mechanism for reciprocating it, and mechanism for intermittently advancing it, as described, with the auxiliary mechanism for sustaining the tool rack, such auxiliary mechanism consisting of the hanger d, shaft 0, gears f, racks 9, guides 71., and roller 2', all constructed, arranged, and adapted to the toolrack and the frame A, substantially as set forth.

3. The combination of the log-supportingarher and center, the sliding tool-rack and its sustaining-carriage, the mechanism for reciprocating such carriage, as set forth, the mechanism for intermittently feeding the tool-racks, and the mechanism, as described, for supporting the said racks, this latter mechanism consisting of the hanger d, shaft 0, gearsf, racks g, guides l1, and roller 2', all being arranged in the frame and to operate substantially as explained.

WILLIS D. HATCH. Witnesses:

R. H. EDDY,

B. PRATT. 

